I want Kane to lose his mind and go on an "attack everybody" run like he did on Raw years back. Start it at Wrestlemania where he attacks Taker after his match and proceeds to put Taker in a casket and leaves with him.

Over the course of the year, he dominates everybody and nobody is able to stop him, including the beloved Cena. Kane even goes back to sitting up after someone does their top move on him.

It leads to Taker vs. Kane at Mania which would be the last for both men in a casket match which brings out the return of all the men defeated by the Taker. They proceed to beat Kane and Taker down which leads to Paul Bearer coming down to ringside with another casket and druids and the throw Kane in one and Taker in the other.

The caskets get to the top of the ramp when they start to smoke, one red and the other black. Then both men pop on the screen and say whatever it is they say and vow that they may be leaving physically but their spirits will never REST IN PEACE.

1) One last run as the Brothers of Destruction, even if it is just for one match.
2) One last psychotic rampage, resulting in a feud against another psychotic wrestler, e.g. Dean Ambrose. He eventually loses that feud, after which he retires and puts over the other wrestler.

Start hitting people with a tombstone and then go missing from tv for a while. Have Taker on tv getting beat down by 2 or 3 heels. Lanes music hits, he clears the ring then hugs Taker before hitting hit with the Tombstone and grabbing the mic saying "the only thing I have left to achieve in my career is to defeat you at WrestleMania". Streak v career match set up right there

Heck have the BOD take The Shield and punch them through the canvas; then - they can take each one and pull their heads off and drop kick them into the upper bleachers; then Booker T can come out finger point at them, and scream, yell, belch, fart, and all the other things he does while in the ring. The BOD will just look at each other, then back at Booker T, then pick him up and throw him from the ring onto the Announcer's table, thus shutting them up; Vince will come strutting out and announce to the crowd - "Wow!!! What a show!!!"